CN210721084U

CN210721084U - Redundancy analog output board card with recovery diagnosis function

Info

Publication number: CN210721084U
Application number: CN201921747688.4U
Authority: CN
Inventors: 陈海; 赵德政; 林浩; 刘骏; 张彪; 霍书侠; 林国章; 曹蓉
Original assignee: Cec Intelligent Technology Co ltd
Current assignee: Cec Intelligent Technology Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-06-09
Anticipated expiration: 2029-10-16

Abstract

The utility model relates to a take redundancy analog output integrated circuit board of back production diagnostic function. The system comprises: the system comprises a microprocessor, a slave station controller, a data arbitration circuit module, an optical coupler A, an optical coupler B, an analog output extraction circuit module A and an analog output extraction circuit module B. The slave station controller receives data on the EBUS, the data are sent to the microprocessor through the SPI, after the microprocessor receives the data, the data are sent to the data arbitration module through the SPI, then the data arbitration circuit module sends the optical coupler A and the optical coupler B through the SPI bus A and the SPI bus B respectively, and meanwhile, the diagnosis information is sent to the microprocessor. And finally, the analog output and recovery circuit module performs D/A conversion output, simultaneously recovers the output signal in real time, performs A/D conversion, and transmits the signal to the data arbitration circuit through the optocoupler. Compared with other analog acquisition cards, the integrated circuit board provides a redundant output channel, and the reliability is higher. The board card recovers the output signal in real time, and controllability is better.

Description

Redundancy analog output board card with recovery diagnosis function

Technical Field

The invention belongs to the field of EtherCAT (Ethernet control automation technology), and particularly relates to an industrial real-time Ethernet EtherCAT analog slave station board card.

Background

EtherCAT is a field bus based on Ethernet, and has the characteristics of high real-time, flexible topological structure, system configuration and the like. With the increasing real-time requirements of the industry, more and more applications are obtained. The patent with the authorization number of CN201621134318.X discloses an EtherCAT voltage analog signal output module, which comprises a power supply indicator, a P # IN connection, a communication indicator, an LED indicator, an external resistor, a protective tube, an EtherCAT status indicator, a P # OUT connection, a communication indicator, a PBUS module signal bus, a plug terminal, a 24V contact and a 0V contact which are arranged on the side surface of an EIM4014 module, wherein the bottom of the EIM4014 module is provided with a DIN guide rail, the EIM4014 module is provided with the power supply indicator, the P # IN connection and the communication indicator are arranged below the power supply indicator, the EtherCAT status indicator is arranged on the right side of the power supply indicator, the P # IN connection and the communication indicator, the P # OUT connection and the communication indicator are arranged below the EtherCAT status indicator, the plug terminal is arranged below the P # IN connection, the communication indicator, the P # OUT connection and the communication indicator, the plug terminal is provided with the PBUS module signal bus on the right side of the plug terminal, and a 24V contact is arranged below the right side of the EIM4014 module, and a 0V contact is arranged below the 24V contact. Because this patent can't acquire output signal actual conditions information, and do not have the redundant function, consequently field safety is low.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a real-time Ethernet EtherCAT redundancy analog output board card based on a domestic microprocessor.

In order to achieve the purpose, the invention adopts the following technical scheme:

a redundancy analog quantity output board card based on a domestic CPU with an extraction diagnosis function comprises: the system comprises a microprocessor, a slave station controller, a data arbitration circuit module, an optical coupling isolator A, an optical coupling isolator B, an analog output extraction circuit module A and an analog output extraction circuit module B. Wherein the content of the first and second substances,

the microprocessor realizes the application layer protocol of the EtherCAT slave station, communicates with the slave station controller through an SPI bus and responds to a slave station protocol data packet. Communicating with a data arbitration circuit through an SPI bus, outputting analog quantity code values and inputting field diagnosis data;

the slave station controller realizes the protocols of an EtherCAT slave station physical layer and a data link layer and is communicated with the microprocessor through an SPI bus;

the data arbitration circuit module is used for realizing the arbitration and diagnosis of analog quantity data, is in communication connection with the microprocessor through an SPI bus, is connected with the optical coupling isolator A through the SPI bus A and is connected with the optical coupling isolator B through the SPI bus B;

the optical coupler isolator A is connected with the data arbitration circuit module and the analog quantity output extraction circuit module A, and electrically isolates a field end from a system end;

the optical coupler isolator B is connected with the data arbitration circuit module and the analog quantity output extraction circuit module B, and electrically isolates a field end from a system end;

the analog quantity output and recovery circuit module A realizes analog quantity output and recovery and is connected with the optocoupler isolator A through an SPI bus C;

the analog output and recovery circuit module B realizes analog output and recovery and is connected with the optocoupler isolator B through an SPI bus D;

further, the slave station controller outputs an interrupt request signal to the microprocessor, and the microprocessor responds to various protocol application layer event interrupts and clock synchronization interrupts of EtherCAT communication through the interrupt signal; the slave station controller outputs two signals to the microprocessor for judging whether the field data output is effective or not;

further, the slave station controller provides at least 2 communication interfaces, the physical layers of the communication interfaces all adopt an EBUS low-voltage differential form, and data streams are input from one communication interface EBUS0 and output from the other communication interface EBUS 1;

further, the slave station controller adopts ET1100 or ET 1200;

further, the microprocessor employs SPARC V8;

furthermore, the data arbitration circuit module adopts an FPGA;

furthermore, the analog quantity output recovery circuit module A consists of an analog quantity output circuit A and an analog quantity recovery circuit A;

furthermore, the analog quantity output and recovery circuit module B is composed of an analog quantity output circuit B and an analog quantity recovery circuit B.

Compared with the prior art, the invention has the following beneficial effects:

(1) each analog output channel of the invention is provided with a corresponding analog recovery channel, so that analog data can be recovered in real time, and the equipment stability is high;

(2) the invention adopts the optical coupling isolator to realize the electrical isolation between the field side and the system side, thereby improving the anti-electromagnetic interference capability of the slave station system;

(3) the invention has 2 independent analog quantity output extraction circuit modules A and B, which can realize the redundant output function;

(4) the data processing of the invention is realized by the cooperation of the microprocessor and the data arbitration module, wherein the data arbitration module is responsible for the data preprocessing, thereby reducing the workload of the microprocessor and having high module data processing efficiency.

Drawings

FIG. 1 is a block diagram of a domestic CPU-based redundant analog output board card with a recovery diagnosis function;

FIG. 2 is a logic diagram of the internal logic of the data arbitration circuit of the redundant analog output board card based on the domestic CPU with the recovery diagnosis function.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

A composition block diagram of a domestic CPU-based redundant analog quantity output board card with an extraction diagnosis function is shown in figure 1, and comprises a microprocessor, a slave station controller, a data arbitration circuit module, an optical coupling isolator A, an optical coupling isolator B, an analog quantity output extraction circuit module A and an analog quantity output extraction circuit module B.

The slave station controller realizes the EtherCAT slave station physical layer and data link layer protocols. The slave station controller adopts ET1100 or ET1200, and the embodiment adopts ET 1200. The ET1200 operates in the 00 mode, the physical layers of both communication interfaces are in the EBUS format (data transmission standard of LVDS used by befort, germany), and the data stream is input from EBUS0 and output from EBUS 1. Configuration information on the EEPROM is read from the station controller.

And the microprocessor is used for realizing an EtherCAT slave station application layer protocol. The microprocessor of the embodiment adopts a domestic SPARC V8 type 32-bit CPU, and communicates with the ET1200 and the data arbitration circuit module through an SPI bus. The CPU expands SRAM and FLASH through 16-bit data address bus.

The analog quantity output and recovery circuit module consists of an analog quantity output circuit and an analog quantity recovery circuit. The analog quantity output circuit receives data on the SPI bus, converts a digital quantity signal into an analog quantity signal and outputs the analog quantity signal; the analog quantity recovery electricity recovers the output analog quantity signal, converts the output analog quantity signal into a digital quantity signal and transmits the digital quantity signal to the system side through the SPI bus.

The data arbitration circuit module is used for realizing the data preprocessing function. The data arbitration circuit of this embodiment adopts domestic FPGA, is connected with microprocessor, opto-coupler isolation circuit through the SPI bus. On one hand, the data arbitration circuit module receives data of the microprocessor, and after decoding and encoding, the data are respectively sent to the optical coupler isolator A and the optical coupler isolator B through the SPI bus A and the SPI bus B. On the other hand, after receiving the extraction data sent back by the optical coupler isolator, the data arbitration circuit module performs certain judgment processing and then sends diagnosis words to the microprocessor.

Further as shown in FIG. 2, the data arbitration internal logic relationship is as follows:

1. power-on initialization;

2. receiving microprocessor data

3. Judging whether the configuration information is stored or not, if the configuration information is stored, judging whether the configuration information is data or not;

4. if the judgment result is data, performing redundancy judgment, otherwise, returning the state to the state of receiving the microprocessor data;

5. if the output is judged to be redundant output, redundant output operation is carried out, otherwise non-redundant output is carried out;

6. finally, judging whether diagnosis is needed;

7. if necessary, calculating and storing the diagnosis information, otherwise, returning the state to the state of receiving the microprocessor data;

the optical coupling isolator is used for realizing the electrical isolation between the field side and the system side, and the anti-electromagnetic interference capability of the system is improved.

The analog quantity output and recovery circuit module realizes the output of analog quantity signals and the analog quantity recovery function. This embodiment comprises analog output circuit and analog quantity extraction circuit two parts, and wherein analog output circuit is responsible for receiving the digital signal and converting into the analog quantity through SPI and export, and analog extraction circuit is responsible for gathering the analog signal in real time and converting into digital signal and sending to through the SPI bus opto isolator.

The present invention is not limited to the above-described embodiments, and any obvious modifications or alterations to the above-described embodiments may be made by those skilled in the art without departing from the spirit of the present invention and the scope of the appended claims.

Claims

1. The utility model provides a redundant analog output integrated circuit board of area back production diagnostic function which characterized by analog output integrated circuit board includes: microprocessor, slave station controller, data arbitration circuit module, optical coupler A, optical coupler B, analog output extraction circuit module A and analog output extraction circuit module B, in which

The microprocessor realizes an EtherCAT slave station application layer protocol, communicates with the slave station controller through an SPI bus, communicates with a data arbitration circuit through the SPI bus, outputs an analog code value and inputs field diagnosis data;

the data arbitration circuit module realizes the arbitration and diagnosis of analog quantity data, is in communication connection with the microprocessor through an SPI bus, is connected with the optocoupler A through the SPI bus A and is connected with the optocoupler B through the SPI bus B;

the optical coupler A is connected with the data arbitration circuit module and the analog quantity output extraction circuit module A, and electrically isolates a field end from a system end;

the optical coupler B is connected with the data arbitration circuit module and the analog quantity output extraction circuit module B, and electrically isolates a field end from a system end;

the analog quantity output and recovery circuit module A realizes conversion from digital quantity to analog quantity and is connected with the optocoupler A through an SPI bus C;

the analog quantity output and recovery circuit module B realizes conversion from digital quantity to analog quantity and is connected with the optocoupler B through an SPI bus D;

further, the slave station controller outputs an interrupt request signal to the microprocessor, and the microprocessor responds to protocol application layer event interrupt and clock synchronization interrupt of EtherCAT communication through the interrupt signal; the slave station controller outputs two signals to the microprocessor for judging whether the field data output is effective or not;

further, the slave station controller adopts ET1100 or ET 1200;

further, the microprocessor employs SPARC V8;

furthermore, the data arbitration circuit module adopts an FPGA;

2. The analog output board card according to claim 1, wherein the data arbitration circuit module is implemented by an FPGA and communicates with the outside through the SPI.

3. The analog quantity output board card according to claim 1, wherein the optical coupler A and the optical coupler B are independent from each other, and when one party fails, the other party does not affect the operation of the other party.

4. The analog output board card of claim 1, wherein the analog output recovery circuit module a and the analog output recovery circuit module a are independent from each other, and when a problem occurs, the other side does not affect the operation.

5. The analog output board card of claim 1, wherein the analog output and extraction circuit module is composed of an analog output circuit and an extraction circuit.

6. The analog output board card according to claim 1, wherein the slave station controller communicates with the outside by means of EBUS.